<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>伪类选择器</title>
    <style>
        a:hover{
            color: rgb(1, 18, 18);
        }
        .box:hover{
            color: aquamarine;
        }

    </style>
</head>
<body>
    <a href="#" >a标签，超链接</a></a>
    <div class="box">p标签,实现了box类</div>
</body>
</html>